As of 4:10 PM CDT on April 30, 2026, out of 10 cities in Mason County, IL in our database, 9 cities (90%) have a UV Index reading of Low, while 1 city (10%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Goofy Ridge, IL with a reading of 2.7.
Over the next 24 hours, the highest UV Index reading in Mason County, IL is expected to be 7.3 in Havana between 1:00 PM - 2:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |